FIELD: instrumentation engineering.
SUBSTANCE: invention relates to method of revealing short-time short circuits in load circuits by evaluating amount of dissipated heat exceeding preset value. Proposed device contains control circuit to reveal moments of appearance of short-time short circuit. Said control circuit makes it possible to determine main parameters of short circuit. Taken as main parameter is time period during which load current exceeds preset reference current value in load. Taken as second parameter is time period during which load current is either less than or equal to preset reference value. During each preset time period control circuit takes into memory one of parameters and basing of combination of their values, reveals presence of short-time short circuit.
EFFECT: improved reliability of determination of moments of short circuits.
5 cl, 4 dwg
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